Note 8 - Segment Information and Disaggregated Revenue (Details Textual) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)
Number of Reportable Segments			3
Revenue from Contract with Customer, Including Assessed Tax	$ 13,631	$ 14,088	$ 39,234	$ 36,393
Europe [Member]
Revenue from Contract with Customer, Including Assessed Tax	$ 2,573	$ 1,878	$ 6,918	$ 4,391